ionic在android8.1调用camera插件闪退的问题。

调用插件闪退是因为backemode插件的问题，并且这个问题仅在android 8.1上出现。经过一番查阅后发现，在android8.1之后我们必须创建自己的通知通道。修改cordova-plugin-background-mode/src/android/ForegroundService.java文件

找到下面代码

Notification.Builder notification=newNotification.Builder(context).setContentTitle(title).setContentText(text).setOngoing(true).setSmallIcon(getIconResId(settings));

在之后添加：

//upgrade to sdk 26, fix problems with android 8.1

    if (android.os.Build.VERSION.SDK_INT >= 26) {

      //Set the channel’s ID  这里要填写你自己的app name//

      String CHANNEL_ONE_ID = "com.yourapp.ONE";

      //Set the channel’s user-visible name//

      String CHANNEL_ONE_NAME = "Channel One";

        //This only needs to be run on Devices on Android O and above

        NotificationManager notificationManager =

                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        NotificationChannel mChannel = new NotificationChannel(CHANNEL_ONE_ID, CHANNEL_ONE_NAME, NotificationManager.IMPORTANCE_DEFAULT);

        mChannel.enableLights(true);

        mChannel.setLightColor(Color.MAGENTA);

        if (notificationManager != null) {

            notificationManager.createNotificationChannel(mChannel);

        }

        notification.setChannelId(CHANNEL_ONE_ID);

    }       

    if (settings.optBoolean("hidden", true)) {

        notification.setPriority(Notification.PRIORITY_MIN);

    }